morse



(Nb Model.)

P. H. MORSE.

POLISHING WHEEL.

No. 277,325. Patented May 8,1883.

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'2 v a I UNITED STATE FRED. H. MORSE, 0F MOlEIAWK, NEl/V YORK, ASSIGNOR OF ONE-HALF TO J ERRID PETRIE, OF SAME PLACE.

POLISHING-WHEEL.

SPECIFICATION forming part of Letters Patent No. 277,325, dated May 8, 1883,

Application filed February 6, 1883. (No model.)

To all whom it may concern Be it known that I, FRED H. Moasrn'a citizen of the United States, residing at Mohawk, in the county of Herkimer and State of New York, haveinvented certain new and useful lmprovementsin Polishing-Wheels, of which the following is a specification, reference being had therein to the accompanying drawings.

Figure 1 is a perspective view of my improved polishingsmachine, a portion .of the polishing-wheel being broken away to show its construction, and Fig. 2 is a plan view of said wheel from the lower side.

The object of i this invention is to construct a'polishing-wheel which may be driven at a more rapid rate of revolution than those in use without throwing 0d the sand, emery, or other polishing substance by centrifugal ac tion.

In the drawings, A is the wheel, mounted at the lower end of a vertical shaft, B, and adjusted thereon by any of the welLknown contrivances which are used for that purpose. Shaft B carries a beltpulley, c, and is supported in bearings fixed to the outer ends of arms D D, which are pivoted at their inner ends to a second shaft, E, carrying two beltpulleys, e e, pulley 0 being connected with pulley c by a belt, 0. Belt-pulley e is connected by belt F with pulley f on shaft G, shafts E and G being also connected by parallel arms H I. This method of supporting and imparting motion to a revolving shaft, B, is common in polishing-machines, and therefore need not be further described, it being of course understood that the shaft is driven by some suitable motor.

The upper face of wheel A is, by preference, flat, its under or lower face being provided with a rim, a, and with a series of ribs, to. These ribs are by preference epicycloidal in plan, and are tapering, their outer ends being thinner than their centers. By an examination of Fig. 2 it will be seen that the outer ends of these ribs are in advance of their inner ends in the direction of travel of the wheel, and it will be readily understood that their form and relative arrangement are such that when in operation they tend to overcome the centrifugal action of the wheel upon the sand or other grinding material, and hence maintain a substantially uniform distribution of the grinding material over theentire space which is inclosed between the hub and rim of the wheel; but if, under any circumstances, ma- 5 terial becomes massed or banked up against the rim of the wheel temporarily, its forward movement will be checked by reason of the spaces between the ends of the ribs and the rim, and it will be caught by the next or suc- 6c ceeding rib or ribs and thrown inward toward the hub, this operation assisting materially in maintaining a proper distribution of the grinding material. The inner ends of these ribs extend to within a short distancesay three inches-of the center of the wheel, their outer ends being from one-fourth to one-half of an inch from the rim a. The lower edges of the ribs and of the rim are in a common plane. For a wheel of two feet in diameter, I prefer to make the rim and the ribs project about two inches from the body of the wheel. As the wheel is driven in the direction indicated by the arrow 1, Fig. 2, these curved ribs, engaging with the sand, emery, or other polish- 7 ing materials, will overcome the centrifugal action of the revolving wheel, and thus prevent said material from being driven off in tangential lines from the rim of the wheel. Therefore it (the wheel) can be driven at a comparatively high rate of speed without undue waste, and practically without scattering the material by its own centrifugal action.

While I regard the curved form of ribs shown as being the best for practical use, yet I do 8 not wish to be limited'thereby, as some other form-such as arcs of circles-may be employed with practically the same results.

Under some circumstances the ribs may be formed on lines tangential to a smaller circlesay one of one-half or two-thirds the diameter of the wheel--and eifect a great saving in scattering and waste of material. Under some circumstances I may change the form of, the ribs, making them straight and tangential, 5 without departing from the spirit of my invention.

The wheel may be made of soft cast-iron, lead, tin, spelter, bronze, or other suitable material, and is by preference cast in one piece. 13'

What I claim is-- 1 series of circular or curved ribs, arranged with 1. A polishing-wheel provided on its under their outer ends in advance of their inner ends surface withaciroumferential rim and a series relative to the direction of rotation of the of ribs, the outer ends of which terminate a wheel, substantially as set forth.

short distance from the rim, thereby permit- In testimony whereof Iaffix my signature in r 5 ting the polishing material to pass around the presence of two witnesses. I outer ends of the ribs, substantially as set FRED. H. MORSE. forth. Witnesses:

2. A polishing-wheel having its under side SETH JOHNSON, constructed with a circumferential rim and a l JAMES JOHNSON. 

